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The Arabic alphabet evolved either from the Nabataean,[1][2] or (less widely believed) directly from the Syriac.[3] This table shows changes undergone by the shapes of the letters from the Aramaic original to the Nabataean and Syriac forms. Arabic is placed in the middle for clarity and not to mark a time order of evolution. The Arabic script represented in the table below is that of post-Classical and Modern Arabic, not 6th century Arabic script, which is of a notably different form.

In the 2nd or 1st centuries BCE,[4][5] the first known records of the Nabataean alphabet were written in the Aramaic language (which was the language of communication and trade), but including some Arabic language features: the Nabataeans did not write the language which they spoke. They wrote in a form of the Aramaic alphabet, which continued to evolve; it separated into two forms: one intended for inscriptions (known as "monumental Nabataean") and the other, more cursive and hurriedly written and with joined letters, for writing on papyrus.[6] This cursive form influenced the monumental form more and more and gradually changed into the Arabic alphabet.

Laïla Nehmé has demonstrated the transition of scripts from the Nabataean Aramaic to the recognisably Arabic form that appears to have occurred between the third and fifth centuries CE, replacing the indigenous Arabic alphabet.[7]

The first recorded text in the Arabic alphabet was written in 512. It is a trilingual dedication in Greek, Syriac and Arabic found at Zabad in Syria. The version of the Arabic alphabet used includes only 22 letters, of which only 15 are different, being used to note 28 phonemes:

Many myriads of pre-Classical Arabic inscriptions are attested, in alphabets borrowed from Epigraphic South Arabian alphabets (however, Safaitic and Hismaic are not strictly Arabic, but Ancient North Arabian dialects, and written Nabataean is an Aramaic dialect):

Pre-Islamic Arabic inscriptions in the Arabic alphabet are very few, with only 5 known for certain. They mostly use no dots, making them sometimes difficult to interpret, as many letters are the same shape as other letters (they are written with rasm only)

Here are the inscriptions in the Arabic alphabet, and the inscriptions in the Nabataean alphabet that show the beginnings of Arabic-like features.

A large funerary stone is inscribed in the Hasaean dialect using a variety of South Arabian monumental script, with three inscribed lines for the man Matmat, that records both patrilineal and matriarchal descent:[9]

A tomb dedicatory and a prayer to Lāh, Kāhil and ʻAṯṯār to protect the tomb:

"ʿIgl son of Hafʿam constructed for his brother Rabibil son of Hafʿam the tomb: both for him and for his child and his wife, and his children and their children's children and womenfolk, free members of the folk Ghalwan. And he has placed it under the protection of (the gods) Kahl and Lah and ʿAthtar al-Shariq from anyone strong or weak, and anyone who would attempt to sell or pledge it, for all time without any derogation, so long as the sky produces rain or the earth herbage."(Beeston)

"([Th]is is the tomb which SHYMW … built … (2) … [for P]N, hisson, through (the help of) the god of their father … (3) … king Rabel, king of the Nabataeans …" (Butts and Hardy)

"This is the memorial of Julianos, weighed down by long sleep, for whom his father Agathos built it while shedding a tear beside the boundary of the communal cemetery of the people of Christ, in order that a better people might always sing of him openly, being formerly the beloved faithful [son?] of Agathos the presbyter, aged twelve. In the year 239 [of the era of the Provincia Arabia = 344 AD]." (Trombley)

In the 5th century barracks were built. In their southeast tower, which stands to a height of six stories, the names of the archangels—"Michael, Uriel, Gabriel and Raphael"—are inscribed. (Micah Key)

Last inscription in Nabataean language. Epitaph to one Raqush, including curse against grave-violaters:

"This is a grave K b. H has taken care of for his mother, Raqush bint ʿA. She died in al-Hijr in the year 162 in the month of Tammuz. May the Lord of the world curse anyone who desecrates this grave and opens it up, except his offspring! May he [also] curse anyone who buries [someone in the grave] and [then] removes [him] from it! May who buries.... be cursed!"(Healey and Smith)

"This is the funerary monument of Imru' al-Qays, son of 'Amr, king of the Arabs, and (?) his title of honour was Master of Asad and Madhhij. And he subdued the Asadis and they were overwhelmed together with their kings, and he put to flight Madhhij thereafter, and came driving them to the gates of Najran, the city of Shammar, and he subdued Ma'add, and he dealt gently with the nobles of the tribes, and appointed them viceroys, and they became phylarchs for the Romans. And no king has equalled his achievements. Thereafter he died in the year 223 on the 7th day of Kaslul. Oh the good fortune of those who were his friends!" (Bellamy)

"[I] Sharaḥīl, son of Talimu built this martyrium in the year 463 after the destruction of Khaybar by a year."

Cursive Nabataean writing changed into Arabic writing, likeliest between the dates of the an-Namāra inscription and the Jabal Ramm inscription. Most writing would have been on perishable materials, such as papyrus. As it was cursive, it was liable to change. The epigraphic record is extremely sparse, with only five certainly pre-Islamic Arabic inscriptions surviving, though some others may be pre-Islamic.

The Nabataean alphabet was designed to write 22 phonemes, but Arabic has 28 phonemes; thus, when used to write the Arabic language, 6 of its letters must each represent two phonemes:
d also represented ð,
ħ also represented kh%,
ṭ also represented ẓ,
ayin also represented gh%,
ṣ also represented ḍ,%,
t also represented þ.
: In the cases marked %, the choice was influenced by etymology, as Common Semitic kh and gh became Hebrew ħ and ayin respectively.

As cursive Nabataean writing evolved into Arabic writing, the writing became largely joined-up. Some of the letters became the same shape as other letters, producing more ambiguities, as in the table:

Here the Arabic letters are listed in the traditional Levantine order but are written in their current forms, for simplicity. The letters which are the same shape have coloured backgrounds. The second value of the letters that represent more than one phoneme is after a comma. In these tables, ğ is j as in English "June".
In the Arabic language, the g sound seems to have changed into j in fairly late pre-Islamic times, but this seems not to have happened in those tribes who invaded Egypt and settled there.

When a letter was at the end of a word, it often developed an end loop, and as a result most Arabic letters have two or more shapes.
b and n and t became the same.
y became the same as b and n and t except at the ends of words.
j and ħ became the same.
z and r became the same.
s and sh became the same.

After all this, there were only 17 letters that were different in shape. One letter-shape represented 5 phonemes (b t th n and sometimes y), one represented 3 phonemes (j ħ kh), and 5 each represented 2 phonemes. Compare the Hebrew alphabet, as in the table at Image:Hebreu hist arabe.png.

A similar ambiguity occurs in the German Fraktur font, in which the Roman alphabet uppercase letters I and J look the same but are officially different letters.

The Arabic alphabet is first attested in its classical form in the 7th century. See PERF 558 for the first surviving Islamic Arabic writing.

In the 7th century, probably in the early years of Islam while writing down the Qur'an, scribes realized that working out which of the ambiguous letters a particular letter was from context was laborious and not always possible, so a proper remedy was required. Writings in the Nabataean and Syriac alphabets already had sporadic examples of dots being used to distinguish letters which had become identical, for example as in the table on the right. By analogy with this, a system of dots was added to the Arabic alphabet to make enough different letters for Classical Arabic's 28 phonemes. Sometimes the resulting new letters were put in alphabetical order after their un-dotted originals, and sometimes at the end.

The first surviving document that definitely uses these dots is also the first surviving Arabic papyrus (PERF 558), dated April, 643. The dots did not become obligatory until much later. Important texts like the Qur'an were frequently memorized; this practice, which survives even today, probably arose partly to avoid the great ambiguity of the script, and partly due to the scarcity of books in times when printing was unheard-of in the area and every copy of every book had to be written by hand.

The lack of vowel signs in Arabic writing created more ambiguities: for example, in Classical Arabicktb could be kataba = "he wrote", kutiba = "it was written" or kutub="books".
Later, vowel signs and hamzas were added, beginning some time in the last half of the 6th century, at about the same time as the first invention of Syriac and Hebrew vocalization. Initially, this was done using a system of red dots, said to have been commissioned by an Umayyad governor of Iraq, Hajjaj ibn Yusuf[citation needed]: a dot above = a, a dot below = i, a dot on the line = u, and doubled dots giving tanwin. However, this was cumbersome and easily confusable with the letter-distinguishing dots, so about 100 years later, the modern system was adopted. The system was finalized around 786 by al-Farahidi.

Before the historical decree by Hajjaj ibn Yusuf, all administrative texts were recorded by Persian scribes in Middle Persian language using Pahlavi script, but many of the initial orthographic alterations to the Arabic alphabet might have been proposed and implemented by the same scribes.

When new signs were added to the Arabic alphabet, they took the alphabetical order value of the letter which they were an alternative for: tā' marbūta (see also below) took the value of ordinary t, and not of h. In the same way, the many diacritics do not have any value: for example, a doubled consonant indicated by shadda does not count as a letter separate from the single one.

Some features of the Arabic alphabet arose because of differences between Qur'anic spelling (which followed the Meccan dialect pronunciation used by Muhammad and his first followers) and the standard Classical Arabic. These include:

tā' marbūta: This arose because the -at ending of feminine nouns (tā' marbūta) was often pronounced as -ah and written as h. To avoid altering Quranic spelling, the dots of t were written over the h.[citation needed]

y (alif maksura ى) used to spell ā at the ends of some words: This arose because ā arising from contraction where single y dropped out between vowels was in some dialects pronounced at the ends of words with the tongue further forward than for other ā vowels, and as a result in the Qu'ran it was written as y.[clarification needed][citation needed]

ā not written as alif in some words: The Arabic spelling of Allāh was decided before the Arabs started using alif to spell ā. In other cases (for example the first ā in hāðā = "this"), it may be that the Meccan dialect pronounced those vowels short.

hamza: Originally alif was used to spell the glottal stop. But Meccans did not pronounce the glottal stop[verification needed], replacing it with w, y or nothing, lengthening an adjacent vowel, or, between vowels, dropping the glottal stop and contracting the vowels, and the Qur'an was written following Meccan pronunciation. The Arabic grammarians invented the hamzadiacritic sign and used it to mark the glottal stop. Hamza is Arabic for "hook".

Less than a century later, Arab grammarians reorganized the alphabet, for reasons of teaching, putting letters next to other letters which were nearly the same shape. This produced a new order which was not the same as the numeric order, which became less important over time because it was being competed with by the Indian numerals and sometimes by the Greek numerals.

The Arabic grammarians of North Africa changed the new letters, which explains the differences between the alphabets of the East and the Maghreb.

(Note: here "numeric order" means the traditional values when these letters were used as numbers. See Arabic numerals, Greek numerals and Hebrew numerals for more details)
This order is much the oldest. The first written records of the Arabic alphabet show why the order was changed.

Since the early 20th century, as the Ottoman Empire collapsed and European influence increased, many non-Arab Islamic areas began using the Cyrillic or Latin alphabet, and local adaptations of the Arabic alphabet were abandoned. In many cases, the writing of a language in Arabic script has become restricted to classical texts and traditional purposes (as in the Turkic States of Central Asia, or Hausa and others in West Africa ), while in others, the Arabic alphabet is used alongside the Latin one (as with Jawi in Brunei).

Area used

Arabic spelling system

New spelling system

Date

Ordered by

Some constituent republics in the Soviet Union, especially Muslim States